Welcom to Cincinmati, Ohio in Northern Kentucky? No room to expand 'sunken Lunken' airport so they moved across the river about 50 years ago. Lunken Airport has a great observation area and restaurant. You'll never get there and back to make your connection.
There is an observation parking area just East of the CVG
airport. I am not sure how you would get there. Years ago CVG
had an observation deck above the main terminal but I have not noticed it in years. I don't think it is open to the public anymore or if it even still exists but you could ask. 'C' terminal has some local flavor restaurants. Delta has a Crown Room in 'B' terminal.
Wish I could be of more help. Have a safe trip.
"When once you have tasted flight, you will forever walk the earth with your eyes turned skyward" Leonardo Da Vinci